Opera has launched today the final version of Opera Mini 4.2 for Android, currently the only phone with it is the T-Mobile G1 phone. Now we are waiting Opera Mini for iPhone…
Well, here is the change log since the beta version:

Uploading and downloading files through Opera Mini and saving pages for offline viewing

Flash videos redirected to Android’s YouTube player

Double tap now works for zooming in and out

Inline URL entry instead of using native input

Password text entry now hides characters

Problems with exiting application when back button was pressed

Improved trackball speed

Internal pages, like the start page, now have font size extra large for easier navigation

Just download it directly from the Android Market by searching for “Opera”.